I20260121-1800
- modify JavadocHover.getHexConstantValue() to recognize when a char constant is 0 and format the output string properly - add new test to JavadocHoverTests - fixes #2730
- modify JavadocHover.getHexConstantValue() to recognize when a char constant is 0 and format the output string properly - add new test to JavadocHoverTests - fixes #2730